75 Ohm BNC cable

The cable is constructed in such a manner that any modifications you carry out will compromise the build and suffer a loss in audio quality.

"It includes connections inside of electronics on both ends, so it would be safe to go with less than 12 inches to avoid reflections. “ 

Circuits, Tx/Rx, I designed, match driver and receiver impedances to cable, thus no reflections on both ends, length of cable becomes irrelevant..

"why do you need to cut original cable? additional 15inch cable will not hurt your clock or other digital signal much.. if you  are DIY person, there are very good cables to terminate by yourself w/ BNC..."

Because the original cable only 0.7 m and longer but Chord Mscaler and TT2 are stacked together so I don't really need long cables.

Thank you everyone.  I think I will just order 0.7m without cutting it.